CNRFC - Hydrology - Observed River/Reservoir Conditions

*** IMPORTANT *** Week of June 16 - Website Data Outage - Due to a major computer upgrade the week of June 16, nearly all data on the CNRFC web site will not be updated. We anticipate the down time to be approximately 4 days. The latest deterministic hydrologic forecasts for official forecast points will continue to be available at the National Water Prediction Service during this time.

TRINITY RIVER - HOOPA (HOOC1)

Latitude: 41.05º N	Longitude: 123.68º W	Elevation: 333 Feet
Location: Humboldt County in California		River Group: North Coast

Monitor Stage: 44.0 Feet

Flood Stage: 48.0 Feet

Observed Data Credit
	Raw streamflow data is provided by the US Geological Survey (USGS). View USGS Data for this station location.

Historical Stage/Flow Data
Water Year	Peak Discharge (cfs)	Stage (feet)	Date
Most Recent 5 Years
2024*	46,500	28.44	Jan 14, 2024
2023*	66,500	32.28	Mar 15, 2023
2022*	16,600	20.91	Jan 8, 2022
2021*	13,300	19.67	Feb 16, 2021
2020*	25,100	23.65	Jan 26, 2020
Historical High Stage/Flow Events (Period of Record - Oct 1931 to Present)** - Ranked by Flow
1965*	231,000	57.00	Dec 22, 1964
1956	190,000	36.90	Dec 22, 1955
1974*	145,000	45.98	Jan 16, 1974
1983*	122,000	43.16	Jan 27, 1983
1997*	122,000	42.97	Jan 01, 1997
1986*	116,000	42.43	Feb 18, 1986
* Discharge affected by regulation or diversion
** Most recent continuous record back to Oct 1931 with segmented periods back to Oct 1911

Location Photographs
Upstream Photo	Gage House Photo	Downstream Photo

ESRI™ Locator Map

Official 7 Day National Weather Service Forecast (CAZ105)

Today: Mostly cloudy in the morning then clearing. Highs 68 to 83.

Tonight: Mostly clear. Lows 41 to 51.

Tuesday: Sunny. Highs 74 to 89.

Tuesday Night: Mostly clear. Lows 45 to 55.

Wednesday: Sunny. Highs 75 to 90.

Wednesday Night through Thursday Night: Partly cloudy. Lows 43 to 53. Highs 75 to 90.

Friday: Mostly cloudy in the morning then becoming partly cloudy. Highs 63 to 78.

Friday Night and Saturday: Partly cloudy. Slight chance of rain showers. Lows 40 to 50. Highs 63 to 78.

Saturday Night and Sunday: Partly cloudy. Lows 40 to 50. Highs 70 to 85.

Flood Impacts
57.0 Feet	Severe flooding of roads, bridges and structures in and around low areas of the river is expected. Many road closures are likely including Highway 96 at several locations between Willow Creek and Weitchpec. Many homes and businesses in valley areas will be innundated.
55.0 Feet	Extensive and severe flooding between Willow Creek and Weitchpec, and flooding of many homes and businesses in the valley areas. Expect closure of Highway 96 between Willow Creek and Weitchpec.
53.0 Feet	Extensive flooding of all low lying areas adjacent to the river, including Highway 96 north and south of Hoopa. Significant damage to structures in these areas is likely.
51.0 Feet	Extensive flooding of all low lying areas adjacent to the river including Highway 96 both north and south of Hoopa is likely. Significant damage to structures in these areas is possible.
48.0 Feet	Considerable flooding of low lying areas adjacent to the river including Highway 96 is likely. Significant damage to structures in these areas is possible.
46.0 Feet	Flooding of many low lying areas near the river is likely. Minor flooding may occur over Highway 96 between Willow Creek and Hoopa.
44.0 Feet	Minor flooding of the lowest lying areas may occur.

Product Disclaimer

This river graphic is not intended to serve as a substitute for official flood watches, warnings, advisories, or statements issued by the NWS Eureka Weather Forecast Office. Observations are preliminary and subject to change. River levels identified as "forecast" should be consistent with those contained in official NWS products. River levels identified as "guidance" have significant uncertainty due to future weather or reservoir regulation and are provided for planning purposes only.

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